MESOSCALE DISCUSSION 1309
   NWS STORM PREDICTION CENTER NORMAN OK
   1209 AM CDT MON JUN 20 2011
   
   AREAS AFFECTED...SOUTH CAROLINA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 517...
   
   VALID 200509Z - 200645Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 517
   CONTINUES.
   
   A LOCALIZED/MARGINAL SEVERE THREAT MAY CONTINUE OVERNIGHT ACROSS THE
   PIEDMONT INTO THE COASTAL PLAIN...BUT THE NEED FOR AN ADDITIONAL WW
   IS NOT CURRENTLY ANTICIPATED.
   
   SOME REINTENSIFICATION OF STORMS HAS OCCURRED AS THE COLD POOL OF A
   WEAKENING SMALL CONVECTIVE CLUSTER ADVANCED TO THE LEE OF THE GREAT
   SMOKY MOUNTAINS.  VERTICAL SHEAR APPEARS MODESTLY STRONG ON THE
   SOUTHERN FRINGE OF A BELT OF 30-40 KT CYCLONIC FLOW...AND THE
   BOUNDARY LAYER ACROSS THE PIEDMONT INTO THE COASTAL PLAIN OF SOUTH
   CAROLINA REMAINS MOIST AND POTENTIALLY UNSTABLE.  IT DOES NOT APPEAR
   OUT OF THE QUESTION THAT STORM-SCALE DYNAMIC FORCING COULD MAINTAIN
   CURRENT ACTIVITY...BUT A SIGNIFICANT FURTHER INCREASE IN SIZE OF THE
   EVOLVING CLUSTER APPEARS UNLIKELY.
   
   ..KERR.. 06/20/2011
   
   
   ATTN...WFO...ILM...CHS...CAE...GSP...
   
   LAT...LON   34598226 34648152 34388073 34127995 33767937 33327974
               33378072 33628163 34198262 34598226